Anaconda, Mont.

Built on a former ore mine and cooper-smelting facility that became one of the biggest Federal EPA Superfund waste sites in the country, Old Works provided Nicklaus with one of his greatest challenges. He had to cap much of the course’s footprint and line the bottoms of the greens, bunkers, lakes and even tree roots to prevent upward leakage. The site’s history is evident in the black slag used for bunker sand.